This. The middle of the OL was a sieve. 5 sacks, 12 pressures from mostly 3 and 4-man rushes. Matt Wyatt had one play in his film study video where Mclaughlin and Dalcourt were beaten in a combo block by a single DL. Earlier in thread someone said that Mclaughlin may be dealing with an injury which might explain his early troubles.
The QB/OL blame game feels like a chicken-and-egg argument to me. Yes, Milroe made some terrible decisions, but the OL also never gave him a chance to develop a rhythm and build some confidence. And the offensive scheme installed by the coaches didn't play to JM's strengths either. A team failure.
If the staff wants to try another QB (I'm guessing Buchner starting is a Tommy Rees thing), they should also experiment with OL personnel as well.